GIMP (http://www.gimp.org) is the GNU Image Manipulation Program. It is a freely distributed piece of software for such tasks as photo retouching, image composition and image authoring. It works on many operating systems, in many languages.
GIMP can support Adobe-compatible plugin using third-party program PSPI written by Tor Lillqvist (http://www.gimp.org/~tml/gimp/win32/pspi.html).
In order to run Adobe-compatible plugins under GIMP you must to do following:
1. Download GIMP extension PSPI from http://www.gimp.org/~tml/gimp/win32/gimp-pspi-1.0.7.win32.zip
2. Extract downloaded ZIP file to GIMP install folder (usually c:\Program Files\Gimp-2.0)
IMPORTANT: file pspi.exe must be in “c:\Program Files\Gimp-2.0\lib\gimp\2.0\plug-ins” folder where “c:\Program Files\Gimp-2.0” is a GIMP installation folder).
Do not run this file – it is a GIMP extension, not stand-alone application.
3. Install third-party Adobe-compatible plugin (for example ImageSkill Tile Builder http://www.imageskill.com/tilebuilder/TileBuilder_Demo_Setup.exe ) to any folder (default folder for ImageSkill Tile Builder is “C:\Program Files\ImageSkill\Tile Builder Demo”)

ImageSkill Tile Builder installation
3. Run (or re-run) GIMP and set folder for Adobe-compatible plugin using “Filters->Photoshop plugin settings” command (you will see it if install PSPI correctly)

PSPI was installed correctly
If you install PSPI.EXE incorrectly you do not see this menu item

PSPI was installed incorrectly
4. Set “C:\Program Files\ImageSkill” as Adobe-compatible plugin folder.

Set Adobe-compatible plugin folder
7. Create layer (add alpha channel) from image using “Layer->Transparency->Add Alpha Channel” command. It needs if you will run plugins that request layer (transparency) feature.

Add alpha channel to image
7. Run Tile Builder using “Filters->ImageSkill->Tile Builder” command.

Run ImageSkill Tile Builder
I hope that this information can help you.
Regards, Chernichenko Dmitry
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ImageSkill Software -good plugins for you
http://www.imageskill.com
Tags: Adobe, filter, GIMP, imageskill, Photoshop, plugin, plugins, PSPI, tesselation, texture, Tile Builder